Method for manufacturing anti-electromagnetic interference shields

ABSTRACT

A method for manufacturing anti-EMI shields on a computer chassis includes the following steps. An anti-EMI plate and a plate on the computer chassis are separately cut into desired dimensions by a cutting machine. The anti-EMI plate and the plate with are washed with cleaning agent. The anti-EMI plate is glued on an EMI area of the plate. The plate is pre-dried with the anti-EMI plate by a drying machine. The anti-EMI plate is pre-pressed onto the plate by a pressing machine. The anti-EMI plate is pressed onto the plate by the pressing machine. The plate is quick dried with the anti-EMI plate by the drying machine. The plate is stamped into desired shape with the anti-EMI plate by a stamping machine.

CROSS-REFERENCE

This is a continuation case of U.S. patent application Ser. No. 12/476,758 filed on Jun. 2, 2009, entitled “METHOD FOR MANUFACTURING ANTI-ELECTROMAGNETIC INTERFERENCE SHIELDS”, entire contents of which are herein incorporated by reference.

BACKGROUND

1. Technical Field

The present disclosure relates to a manufacture method, particularly to a method for manufacturing anti-electromagnetic interference (anti-EMI) shields on computer chassis.

2. Description of Related Art

In observation of recent developments in the electronics industry, particularly the wide uses of various electronic products, unnecessary voltages or currents exist among various internal systems of the compact electronic product and produce many wide-frequency noises. Such noises seriously affect functions of various parts of the electronic products. This phenomenon is called electromagnetic interference (EMI). EMI is a complicated problem in the computer manufacturing industry. The interference sources may include the central processing unit (CPU), motors, inverters, relays, switches, transistors, amplifiers, power supplies, or other exchange circuits.

To ensure operations of electronic products in normal EM environments, countries all over the world have started to implement EM controls, gauging the standards of many electronic, communication, scientific, industrial, and medical instruments. Exported or local products have to pass tests in certified EM compatibility laboratories before they can be sold on the market. In general, the occurrence of EMI in electronic information products may result from bad internal circuit designs or shielding. To solve the problems caused by EMI, the prior art suggested that one can either improve the circuit or use EM wave shielding material shields to absorb or block EM waves. A method for manufacturing anti-EMI shields on a computer chassis includes the steps of molding the plate of the computer chassis and the anti-EMI shields, then mounting the anti-EMI shields onto the plate by riveting or screwing. Processes in such a method are very inconvenient and time-consuming in a factory assembly line. Therefore, there is room or improvement within the art.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with references to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a flow chart of an embodiment of a method for manufacturing anti-EMI shields on computer chassis.

FIG. 2 is a flow chart of another embodiment of a method for manufacturing anti-EMI shields on computer chassis.

DETAILED DESCRIPTION

FIG. 1 is a flow chart of an embodiment of a method for manufacturing anti-EMI shields on a computer chassis. The method for manufacturing anti-EMI shields includes the following steps:

In Step S1: washing an anti-EMI plate and a plate of the computer chassis with cleaning agent;

In Step S2: gluing the anti-EMI plate on an EMI area of the plate;

In Step S3: pre-drying the plate with the anti-EMI plate by a drying machine;

In Step S4: pre-pressing the anti-EMI plate onto the plate by a pressing machine;

In Step S5: pressing the anti-EMI plate onto the plate by the pressing machine;

In Step S6: quick drying the plate with the anti-EMI plate by the drying machine;

In Step S7: cutting the plate with the anti-EMI plate to desired dimensions by a cutting machine;

In Step S8: stamping the plate with the anti-EMI plate into a desired shape by a stamping machine.

In this embodiment, the drying machine is a belt-type automatic drying machine. The pressing machine is a dual roller-type pressing machine. The cutting machine is a cut-to-length type cutting machine. The anti-EMI plate is made of elastic material. Pre-drying and quick drying the plate with the anti-EMI plate by the belt-type automatic drying machine can prevent the plate distorting during the stamping step. The anti-EMI shields are integrally formed with the plate of the computer chassis via gluing, pressing, drying, cutting, and stamping steps in the present embodiment.

Referring to FIG. 2, in another embodiment, the method includes the following steps:

In Step S10: washing an anti-EMI plate and a plate of the computer chassis with cleaning agent;

In Step S20: separately cutting the plate and the anti-EMI plate to desired dimensions by a cutting machine;

In Step S30: gluing the anti-EMI plate on an EMI area of the plate;

In Step S40: pre-drying the plate with the anti-EMI plate by a drying machine;

In Step S50: pre-pressing the anti-EMI plate onto the plate by a pressing machine;

In Step S60: pressing the anti-EMI plate onto the plate by the pressing machine;

In Step S70: quick drying the plate with the anti-EMI plate by the drying machine;

In Step S80: stamping the plate with the anti-EMI plate into a desired shape by a stamping machine.

It is to be understood, however, that even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

1. A method for manufacturing anti-EMI shields on a computer chassis, the method comprising: separately cutting a plate of the computer chassis and an anti-EMI plate to desired dimensions by a cutting machine; washing the anti-EMI plate and the plate with cleaning agent; gluing the anti-EMI plate on an EMI area of the plate; pre-drying the plate with the anti-EMI plate by a drying machine and pre-pressing the anti-EMI plate onto the plate by a pressing machine; pressing the anti-EMI plate onto the plate by the pressing machine; quick drying the plate with the anti-EMI plate by the drying machine; and stamping the plate with the anti-EMI plate into a desired shape by a stamping machine.
 2. The method of claim 1, wherein the cutting machine is a cut-to-length type cutting machine.
 3. The method of claim 1, wherein the drying machine is a belt-type automatic drying machine.
 4. The method of claim 1, wherein the pressing machine is a dual roller-type pressing machine.
 5. The method of claim 1, wherein the anti-EMI plate is made of elastic material.
 6. A method for manufacturing anti-EMI shields on a computer chassis, the method comprising: separately cutting a plate of the computer chassis and an anti-EMI plate to desired dimensions by a cutting machine; gluing the anti-EMI plate on an EMI area of the plate; pre-drying the plate with the anti-EMI plate by a drying machine and pre-pressing the anti-EMI plate onto the plate by a pressing machine; pressing the anti-EMI plate onto the plate by the pressing machine; quick drying the plate with the anti-EMI plate by the drying machine; and stamping the plate with the anti-EMI plate into a desired shape by a stamping machine.
 7. The method of claim 6, further comprising washing the anti-EMI plate and the plate with cleaning agent before separately cutting the plate of the computer chassis and the anti-EMI plate to desired dimensions by the cutting machine.
 8. The method of claim 6, wherein the cutting machine is a cut-to-length type cutting machine.
 9. The method of claim 6, wherein the drying machine is a belt-type automatic drying machine.
 10. The method of claim 6, wherein the pressing machine is a dual roller-type pressing machine.
 11. The method of claim 6, wherein the anti-EMI plate is made of elastic material. 